A perilous plunge into deeper depths wreaks havoc on Chris McCully's air compressor. Shawn scours foreign ground for gold to keep his operation funded. A faulty sluice box could spell disaster for the Kellys.

Guest: Alyson Hannigan.
Games played: Dating App, Mixed Messages, Song Styles, Whose Line, and Themed Restaurant.

Shawn moves in on Vernon's spot on Claim 56 as the two miners chase the same paystreak, but only one will prevail. Zeke gambles with a move across the ice. Chris McCully hopes his failing pump engine will last. Kris Kelly faces a life-or-death situation.

Puma Punku in Bolivia features some of the largest stone blocks on Earth, each carved with incredible precision. But the blocks lie scattered across the landscape, baffling archaeologists as to what the ancient site might have been. Could new advancements in technology help to solve a centuries old puzzle-and offer proof of alien intervention on Earth?

Guest: Mark Ballas.
Games played: Deleted Scenes, Duet, 90 Second Alphabet, Scenes from a Hat, and Greatest Hits.

Guests: An interview with Alex Karp, co-founder and CEO of Palantir Technologies. This week's panel discussion includes Kristen Soltis Anderson, conservative pollster and CNN contributor; and Al Franken, writer, comedian, former Democratic senator from Minnesota, and host of "The Al Franken Podcast".

When tragedy strikes, Tariq and the Tejadas are set on a mission to avenge what they've lost; Dru must take out a threat to Carter's organization in order to protect his family.

When Mel's best friend deserts her on her birthday, she tries to salvage the day with a gift that knocks her out and wakes her up.

Still in pain from her accident, Mel and Rory go on a prescription drug hunt in the airport's underbelly.

A professional development classroom exercise reveals to Mel why and who has been holding her back..

When Mel finds herself stuck between Alex's past, present and future, it drives her into the arms of a coworker.

In their last adventure, Jeremy Clarkson, Richard Hammond and James May ignore the instructions of Mr Wilman and head to Zimbabwe in three cars they've always wanted to own, a Lancia Montecarlo, a Ford Capri 3-litre, and a Triumph Stag, for a stunning road trip through beautiful and sometimes challenging landscapes leading to an emotional ending on a strangely familiar island.

Emily acquires a protege courtesy of Sylvie and experiences a communication breakdown with Gabriel. Mindy takes a top-down approach to her new gig.

As new relationships blossom, a tragedy threatens to destroy everything. Sunja meets a close friend of Solomon's.

Amy investigates an act of sabotage. Gjert uses Ole's funeral to stall Julie's takeover bid. Hennie takes her friends out in her new boat.

The team advances the investigation with information from the witness. Yu-bin identifies the suspect.

On the day the world should end and doesn't, Tomás returns home to apologize to his wife and daughter after taking off to live a crazy life months ago.

Two brothers have their lives changed when they accidentally remove The Cornerstone of the Galaxy.

With her besties by her side, Bae takes on the men she wants to bring to justice, and her own shame, in a big televised spectacle. Is Bae ready to bring it on?

Coaches will.i.am, Sir Tom Jones, LeAnn Rimes and coach duo Tom Fletcher and Danny Jones from McFly return to select more singers from the third round of Blind Auditions.

Celebrities take to the dance floor to perform a dazzling display of ballroom routines.